Most devices are designed to be held with the mouthpiece up. When you lay one on its side in a pocket or bag, gravity pulls e-liquid toward the airflow holes and the battery connection. That’s how you end up with a sticky mess in your pocket or, worse, liquid seeping into the charging port.

Keep your vape upright whenever you’re not using it. If you carry it in a pocket, make sure it’s vertical. When setting it down on a desk, place it on its base, not on its side. If you notice a small amount of liquid in the mouthpiece, wipe it clean before your next puff. If liquid reaches the battery or charging port, stop using the device immediately—it could short-circuit.